Issue 43, 2015

Fano-resonant aluminum and gold nanostructures created with a tunable, up-scalable process

Abstract

An up-scalable approach for creating Fano-resonant nanostructures on large surfaces at visible wavelengths is demonstrated. The use of processes suitable for high throughput fabrication and the choice of aluminum as a cost-efficient plasmonic material ensure that the presented insights are valuable even in consideration of typical industrial constraints. In particular, wafer-scale fabrication and the process compatibility with roll-to-roll embossing are demonstrated. It is shown that through adjustment of readily accessible evaporation parameters, the shape and position of the optical resonance can be tuned within a spectral band of more than 70 nm. The experimental data are complemented with rigorous coupled wave analysis and surface integral equation simulations. Calculated electric fields as well as surface charges shed light onto the physics behind the present resonances. In particular, a surface plasmon polariton is found to couple to a localized plasmonic mode with a hexapolar charge distribution, leading to a Fano-like resonance. Further understanding of the interactions at hand is gained by considering both aluminum and gold nanostructures.

Graphical abstract: Fano-resonant aluminum and gold nanostructures created with a tunable, up-scalable process

Supplementary files

Article information

Article type
Paper
Submitted
06 Aug 2015
Accepted
01 Oct 2015
First published
08 Oct 2015

Nanoscale, 2015,7, 18179-18187

Fano-resonant aluminum and gold nanostructures created with a tunable, up-scalable process

F. Lütolf, O. J. F. Martin and B. Gallinet, Nanoscale, 2015, 7, 18179 DOI: 10.1039/C5NR05316A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements